// 清除 不同浏览器，样式的默认值
html, body {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  padding: 0;
  height: 100%;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}


body,nav,div,ol,ul,h1,h2,h3,h4,h5,h6,p,th,td,dl,dd,form,fieldset,legend,figure,input,textarea, select {
	margin: 0;
	padding: 0;
}

fieldset,a img, .bor0 {
	border: 0;
}

li {
	list-style: none;
}

a,u,s,del {
	text-decoration: none;
}

i,em,b {
	font-style: normal;
	font-weight: normal;
}

a img {
	border: 0;
}

input,textarea,table,div {
  outline: none;
  box-sizing: border-box;
}